Two scientists at Columbia University believe that carbon-mopping machines modeled after trees could sequester enough carbon from the atmosphere to slow global warming. But can we produce them quickly (and cheaply) enough for the plan to work?

A divestment campaign led by students is changing the national conversation about energy, creating a market for sustainable stocks, and linking up students with communities facing off against the fossil fuel industry.

Many were surprised to hear President Barack Obama take up climate change at today’s inaugural address. Here are a few ways the president can seize the moment and transform our approach to climate action.

Will the United States ever change its policy of obstructing international action to stop climate change? If so, the political pressure to change the country’s role will have to come from the American people.

Oil companies—and many of our political leaders—see melting sea ice as an opportunity to drill deeper. Fortunately, you don’t have to occupy an Arctic drilling platform to join the growing movement of people who are putting themselves on the line for our planet’s future.

A California proposal would offset the state’s climate-altering emissions by paying for forest conservation in Chiapas. Could there be unintended consequences in a region with a history of human rights abuse and land grabs?